Trying out my 'Gift' 1990's EOS 1000FN at the annual Brentwood Half Marathon I set 'Sports Exposure Mode' and used the Canon EF Zoom 75-300mm f4-- 5.6 Mk III and outdated Kodak 400 film rated 250ASA. My shots of the Half Marathon Runners approaching were disappointing -- NOT SHARP and that 'All -Singing- All - Dancing Canon EOS was supposed to give 'Al -servo Follow Focus' at a fast shutter speed - I got the fast speed but NOT the FOCUS ! Come back PENTAX --- all is forgiven !! I did that event Professionally for over 30 years with my Pentax ME Super and MANUAL Focus lenses and got Front Page Pics !